Self-adjusting input current ripple cancellation of coupled parallel connected hysteresis-controlled boost power factor correctors

Kolar, Johann W.; Kamath, G.R.; Mohan, Ned; Zach, Franz

doi:10.1109/pesc.1995.474808

Cited by 72 publications

(7 citation statements)

References 10 publications

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“…In the circuit of the current absorber, which is constructed with , and , the derivative or slope of the reactor current is off (4) where is the current in and is the voltage across . On-state and off-state of create the derivatives of a nonnegative and a nonpositive, respectively, although becomes a zero or according to the switching of .…”

Section: B Control Methods Of the Rectifiermentioning

confidence: 99%

An improvement technique for the efficiency of high-frequency switch-mode rectifiers

Yoshida

Shizuka²,

Miyashita

et al. 2000

IEEE Trans. Power Electron.

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A new technique for improving the efficiency of single-phase high-frequency switch-mode boost rectifiers is proposed. This rectifier includes an additional boost converter that follows the main high-frequency switching device. The additional converter, which is controlled at lower frequencies, bypasses almost all the current in the main switch and the high frequency switching loss is greatly reduced accordingly. Both switching devices are controlled by a simple method; each controller consists of a one-shot multivibrator, a comparator and an AND gate, and the maximum switching frequency can be limited without any clock generator. The rectifier works cooperatively in high efficiency and acts as though it were a conventional high-frequency switch-mode rectifier with one switching device. The proposed method is verified by experiment. This paper describes the rectifier configuration and design, and discusses the steady-state performance concerning the switching loss reduction and efficiency improvement. Transient performance is also included.

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Section: B Control Methods Of the Rectifiermentioning

confidence: 99%

An improvement technique for the efficiency of high-frequency switch-mode rectifiers

Yoshida

Shizuka²,

Miyashita

et al. 2000

IEEE Trans. Power Electron.

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“…The average diode current for each switching period can be expressed by (6) Substituting (2) and (5) into (6) yields (7) The average dc current over one half of the line frequency cycle is (8) Then, at steady state, the dc output power can be obtained as (9) Equation (9) indicates that should be adjusted in accordance with the operating output power and input voltage.…”

Section: Duty-ratio Controlmentioning

confidence: 99%

Parallel operation of modular power factor correction circuits

Moo

Cheng²,

Lin³

2002

IEEE Trans. Power Electron.

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The parallel operation of modular power factor correction circuits is illustrated. The modular units using boost converters are operated at a constant frequency with variable dutyratio. Flexible load demand is met by changing the number of operating modules under the maximum current limit. The operating modules have the same frequency and duty-ratio, but are equally phase-shifted to each other by a fraction of the switching period to reduce the ripple content and to increase the ripple frequency of the input current. With this phase-shifted control strategy, balanced current sharing among modules can be achieved by operating the boost converters at discontinuous current mode, without the need of extra current control circuit. A prototype circuit consisting of 15 modular units, which supply the attempted power rating of 3.75 kVA was implemented to verified the theoretical prediction.

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“…[15] and 6th harmonic injection [49], [50]) and on the reduction of the transistor turn-off losses by soft-switchmng I?]. Furthermore, we would like to point out the reduction of the high amplitudes of switching frequency harmonics of the input current by staggered switching of two systems connected in parallel [51] as known from singlephase power factor correction 1521, [53].…”

Section: Fig4mentioning

confidence: 99%

Status of the techniques of three-phase rectifier systems with low effects on the mains

Kolar

Ertl²

1999

21st International Telecommunications Energy Conference. INTELEC '99 (Cat. No.99CH37007)

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142

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Based on a comprehensive study of the literature concepts of three-phase rectifier systems with low effects on the mains are classified. Such systems are unidirectional and bidirectional self-commutated converters with impressed output voltage or output current and line-commutated rectification in connection with passive and active filtering. Selected circuit concepts are analyzed concerning the operational behavior and the obtainable quality of the mains current. Furthermore, an evaluation of the rectifier concepts concerning utilization of the power semiconductors, rated power of the inductive and capacitive components and of the realization effort in general is given. Finally, problems of a practical application of high switching frequency PWM rectifier systems and topics of further research are discussed.

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Self-adjusting input current ripple cancellation of coupled parallel connected hysteresis-controlled boost power factor correctors

Cited by 72 publications

References 10 publications

An improvement technique for the efficiency of high-frequency switch-mode rectifiers

An improvement technique for the efficiency of high-frequency switch-mode rectifiers

Parallel operation of modular power factor correction circuits

Status of the techniques of three-phase rectifier systems with low effects on the mains

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